I'm really bad at reading signs so I apologise. A few months ago I got a new mgr he was really attractive and ticked all the boxes, I have a long list and he ticked extra boxes I didn't know mattered, I literally felt like I fell right into the 50shades film. I made it clear that I liked him and he seemed to like it and hang around me a lot. And seemed to strut around me peacocking, he made up a nickname for me which I think was flirty, and he called it me all the time with a smile on his face. We laughed together and I really liked his personality. A few months of flirting ( and people around said he was flirting with me too) I find out he's in a relationship. I bring it up in casual conversation when I next see him as I feel really hurt and he acts strange, he laughs it off but then goes out for a long walk. He comes back and things are totally different. He is really quiet, he looks at me like he wants to say something but then stops himself. I ask him questions about his partner and he just dismisses them and is not speaking very highly of his partner. but Next couple of months he distances himself from me, he stops calling me the nick names and acts totally different with me. I don't understand. Unfortunately I didn't know he had a partner when I started to like him and now I do it's too late and it really really hurts. Please help me understand.